— HILARY DUFF, causing quite a stir at Malgosia in Los Angeles. The singer popped into the boutique — which carries unique designers from around the world — and left with some one-of-a-kind finds.

— JOHNNY KNOXVILLE, clothes hunting at Fred Segal in Santa Monica. After making a few rounds through the store, the Jackass star picked up a Steelo blazer to go.

— Meanwhile, EMMA ROBERTS, took a break from filming her new movie Wild Child in Santa Monica and shopped at Fred Segal Fun where she bought a peacoat from Minnie & Rose.

— HEIDI MONTAG, shopped at Rumor Boutique in Los Angeles. By her side, fiance Spencer offered his approval. And the Hills star left with two dresses: a short, sexy Voom by Joy Han silver dress and a sparkly red mini by Flavio Castellani. And Montag also picked up some accessories [DASH] a pair of Jour & Nuit five-inch satin peep toe pumps with Swarovski crystals and a patent leather clutch by Andarei to accessorize her special outfit.

— IVANKA TRUMP, indulging her sensual side with a visit to Bergdorf Goodman in New York. Her purchase? Some Le Mystere No. 9 lingerie!

— CHRISTINA AGUILERA, picking out gear for her home with hubby JORDAN BRATMAN. The pair stopped by La Murrina showroom in Los Angeles, and scoped out the premiere Italian showroom. They also looked at Minotti and Bontempi’s rooms while deciding how to outfit their home.